Andham means darkness. There are two kinds of darkness. If you remain in ignorance, that is also darkness, and if you remain actually in darkness, where there is no sunlight, there is no electric light, that is also darkness. So avidyām upāsate. Another, tato bhūya iva te tamo ya u vidyāyāṁ ratāḥ (ISO 9).
So these materialists, they are certainly being pushed in the darkness. But there is another class, who are so-called philosopher, mental speculators, religionists, yogīs, they are going still more in the darkness, because they are defying Kṛṣṇa. They are posed as if culturing spiritual knowledge, but because they have no information of Kṛṣṇa, or God, their advancement of education is also more dangerous. More dangerous, because they are misleading people.
The yoga system, the so-called yoga, not the real yoga system . . . the so-called yoga system, they are preaching, misleading people that, "You meditate and you'll understand that you are God." By meditation one becomes God. (chuckles) You see? So Kṛṣṇa never meditated. Neither He had any chance of meditation, because from the very beginning of His appearance, Kaṁsa was prepared to kill Him. Then He was transferred by His father to the house of Nanda-Yaśodā. There also, when He was sleeping, a baby, three-months-old baby, the Pūtanā demon attacked. So Kṛṣṇa had no chance to meditate to become God. He is God from the very beginning. That is God. God is God and dog is dog. That is the law of identity.
So these are all nonsense that, "You become still, you become silent, and you become God." Oh, how I can become silent? Is there any possibility of becoming silent? No. There is no such possibility. "You become desireless." So how I can become desireless? These are all bluffs. We cannot be desireless. We cannot be silent. But our desires, our activities, have to be purified. That is real knowledge. That is real knowledge. We shall desire only to serve Kṛṣṇa. That is purification of desire. Not that desireless. That is not possible.
How I can be desireless? How I can be silent? That is also not possible. For a second, I cannot be silent. So then our activities should be engaged, dovetailed in Kṛṣṇa's service. This is real knowledge that, "I, as living entity, I have all these things, activities, desires, loving propensity. Everything is there. But that is being misguided." We do not know where to place all these things. That is avidyā.
So this Īśopaniṣad teaches us that we should be very careful. We should not be very much advanced . . . we may be advanced. That doesn't matter. We don't say that you don't advance in material education. You advance, but, at the same time, you become Kṛṣṇa conscious. That is our propaganda. We don't say that you don't . . . you do not manufacture motorcar or you do not manufacture these so many machines. We don't say.
But we say: "All right, you have manufactured this machine. Employ it in Kṛṣṇa's service." That is our proposal. We don't say stop it. We don't say that you have . . . don't have any sex life. But we say: "Yes, you have sex life—for Kṛṣṇa. You produce Kṛṣṇa conscious children. Hundred times you have sex life. But don't create cats and dogs." That is our proposal.